Handy composition for composer (5)
I believe the answer is:
haydn
'for composer' is the definition.
(Haydn is an example)
'handy composition' is the wordplay.
'composition' is an anagram indicator (letters arranged or composed in a different order).
'handy' anagrammed gives 'HAYDN'.
(Other definitions for haydn that I've seen before include "Joseph -, Austr. composer (Farewell Symphony)" , "Classical composer" , "Barman" , "Austrian composer, d.1809" , "The Seasons composer" .)